Apparatus

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sensors Mode-S transponder

A1A7AD

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N2055R · CESSNA 172 Skyhawk · operated by WNC AVIATION LLC

Hex
A1A7AD
Octal
50323655
Decimal
10,594,221
Country
US
Tail
N2055R
Type
C172
No current signal · last broadcast 17h ago
Flights observed
151
Distinct callsigns
1
Country
US
Last broadcast
17h ago

Last known position

Most recent position reported by Mode-S A1A7AD.

Country allocation

The ICAO 24-bit address A1A7AD falls within the block assigned to United States (US) by ICAO Annex 10, Volume III. Every aircraft registered in United States receives a permanent address from this block at the time of registration; the address stays with the airframe even if the aircraft is re-registered to a different operator within the country.

Callsign history 1 distinct

Callsign Airline Flights Last seen
N2055R - 149 2026-07-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-17 N2055R - Jul 17, 14:00 UTCJul 17, 15:20 UTC1h 20m
2026-07-16 N2055R - Jul 16, 19:45 UTCJul 16, 21:25 UTC1h 40m
2026-07-16 N2055R - Jul 16, 17:35 UTCJul 16, 18:50 UTC1h 15m
2026-07-16 N2055R - Jul 16, 14:25 UTCJul 16, 15:40 UTC1h 15m
2026-07-15 N2055R - Jul 15, 22:55 UTCJul 15, 23:35 UTC40m
2026-07-15 N2055R - Jul 15, 21:00 UTCJul 15, 21:30 UTC30m
2026-07-15 N2055R - Jul 15, 18:35 UTCJul 15, 19:00 UTC25m
2026-07-15 N2055R - Jul 15, 17:30 UTCJul 15, 18:00 UTC30m
2026-07-10 N2055R - Jul 10, 14:20 UTCJul 10, 14:40 UTC20m
2026-07-09 N2055R - Jul 9, 14:00 UTCJul 9, 14:35 UTC35m
2026-07-08 N2055R - Jul 8, 16:55 UTCJul 8, 18:00 UTC1h 5m
2026-07-08 N2055R - Jul 8, 14:15 UTCJul 8, 15:05 UTC50m
2026-07-06 N2055R - Jul 6, 15:00 UTCJul 6, 15:55 UTC55m
2026-07-05 N2055R - Jul 5, 14:45 UTCJul 5, 15:20 UTC35m
2026-07-04 N2055R - Jul 4, 15:10 UTCJul 4, 16:20 UTC1h 10m
2026-07-03 N2055R - Jul 3, 15:35 UTCJul 3, 16:00 UTC25m
2026-07-03 N2055R - Jul 3, 14:00 UTCJul 3, 14:35 UTC35m
2026-07-02 N2055R - Jul 2, 20:00 UTCJul 2, 20:55 UTC55m
2026-07-02 N2055R - Jul 2, 17:00 UTCJul 2, 18:05 UTC1h 5m
2026-07-02 N2055R - Jul 2, 14:10 UTCJul 2, 14:20 UTC10m
2026-07-02 N2055R - Jul 2, 13:15 UTCJul 2, 13:25 UTC10m
2026-07-01 N2055R - Jul 1, 19:55 UTCJul 1, 20:20 UTC25m
2026-06-29 N2055R - Jun 29, 14:19 UTCJun 29, 15:30 UTC1h 10m
2026-06-27 N2055R - Jun 27, 11:39 UTCJun 27, 12:29 UTC50m
2026-06-26 N2055R - Jun 26, 20:24 UTCJun 26, 21:45 UTC1h 20m
2026-06-26 N2055R - Jun 26, 11:09 UTCJun 26, 12:29 UTC1h 20m
2026-06-25 N2055R - Jun 25, 20:19 UTCJun 25, 20:59 UTC40m
2026-06-25 N2055R - Jun 25, 15:04 UTCJun 25, 15:40 UTC35m
2026-06-25 N2055R - Jun 25, 14:04 UTCJun 25, 14:20 UTC15m
2026-06-25 N2055R - Jun 25, 11:19 UTCJun 25, 12:15 UTC55m
2026-06-24 N2055R - Jun 24, 23:00 UTCJun 25, 00:19 UTC1h 20m
2026-06-24 N2055R - Jun 24, 14:20 UTCJun 24, 15:44 UTC1h 25m
2026-06-24 N2055R - Jun 24, 11:05 UTCJun 24, 11:29 UTC25m
2026-06-21 N2055R - Jun 21, 17:29 UTCJun 21, 18:44 UTC1h 15m
2026-06-21 N2055R - Jun 21, 11:30 UTCJun 21, 12:19 UTC50m
2026-06-20 N2055R - Jun 20, 17:24 UTCJun 20, 18:45 UTC1h 20m
2026-06-20 N2055R - Jun 20, 14:24 UTCJun 20, 15:14 UTC50m
2026-06-20 N2055R - Jun 20, 11:44 UTCJun 20, 12:45 UTC1h 0m
2026-06-19 N2055R - Jun 19, 20:24 UTCJun 19, 21:54 UTC1h 30m
2026-06-19 N2055R - Jun 19, 18:25 UTCJun 19, 18:39 UTC15m
2026-06-19 N2055R - Jun 19, 14:29 UTCJun 19, 15:34 UTC1h 5m
2026-06-17 N2055R - Jun 17, 21:20 UTCJun 17, 21:45 UTC25m
2026-06-17 N2055R - Jun 17, 20:30 UTCJun 17, 20:45 UTC15m
2026-06-17 N2055R - Jun 17, 17:25 UTCJun 17, 18:20 UTC55m
2026-06-17 N2055R - Jun 17, 14:15 UTCJun 17, 15:20 UTC1h 5m
2026-06-17 N2055R - Jun 17, 11:50 UTCJun 17, 12:45 UTC55m
2026-06-16 N2055R - Jun 16, 20:15 UTCJun 16, 23:05 UTC2h 50m
2026-06-16 N2055R - Jun 16, 17:19 UTCJun 16, 17:35 UTC15m
2026-06-16 N2055R - Jun 16, 12:39 UTCJun 16, 15:35 UTC2h 55m
2026-06-15 N2055R - Jun 15, 22:49 UTCJun 15, 23:45 UTC55m

About Mode-S

A Mode-S transponder code (also called an "ICAO 24-bit address" or "hex code") is a 6-character hexadecimal identifier permanently assigned to an aircraft when it's first registered. Unlike callsigns (which change with each flight) or registrations (which can change if an aircraft is sold internationally), the Mode-S address stays with the airframe for the life of the aircraft in that country.

Every ADS-B transmission from an aircraft includes its Mode-S address, making it the most reliable way to identify a specific airframe. Flight-tracking services like Apparatus use the Mode-S address as the primary key for tying position broadcasts, callsigns, and ownership records together.

Prefer a tail-number view? See the N2055R page for operator, model, and routing details .

Mode-S A1A7AD frequently asked

What is Mode-S code A1A7AD?
A1A7AD is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N2055R.
Where is Mode-S A1A7AD registered?
Mode-S code A1A7AD is allocated to United States (US). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is A1A7AD broadcasting right now?
No active broadcast right now. Last signal was 17h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A1A7AD, octal 50323655, decimal 10,594,221.
What flights does A1A7AD operate?
Mode-S A1A7AD has broadcast 1 distinct callsign, including N2055R.